S-90471A454 3/8"-16 x 1" ASME B18.6.3 Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with zinc-plated steel construction for long-lasting performance in harsh industrial environments
• Superior holding power with 60,000 psi tensile strength and Rockwell B70 hardness to withstand heavy loads and vibrations
• Reliable thread engagement through Class 2A thread fit and UNC coarse threads for quick installation and reduced cross-threading risks
• Flush surface finishing with standard 100° countersink angle flat head design for seamless integration and improved safety
• Enhanced drive stability with Phillips No. 4 drive style providing secure torque transfer during installation
• Full-length threading ensures maximum grip along the entire 1" length for consistent fastening strength
• Regulatory compliance meets ASME B18.6.3 specifications and environmental standards including RoHS 3 and REACH

Professional Applications & Engineering Value

These 3/8"-16 UNC flat head Phillips screws deliver critical engineering solutions for industrial applications where reliability is paramount. The zinc-plated steel construction provides essential corrosion protection in manufacturing, machinery assembly, and outdoor equipment where exposure to moisture and chemicals is common. The coarse UNC thread profile ensures rapid installation in various materials while maintaining secure fastening, significantly reducing assembly time in production lines. The 100° countersink angle and flat head design create flush surfaces that eliminate protrusions, preventing snagging hazards and enabling smooth operation in moving machinery components. With full threading along the entire 1" length, these screws distribute clamping force evenly, preventing joint loosening under vibration and thermal cycling common in industrial environments.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit tolerance ensuring consistent performance across applications. These flat head screws comply with ASME B18.6.3 specifications for dimensional accuracy and mechanical properties. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming they contain no restricted substances. The inch system measurement, right-hand thread direction, and UNC thread type provide standardization for North American industrial applications requiring reliable heavy-duty fasteners.